Process for recovery of vanadium.



No Drawing.

UNITED STATES PATENT OFFICE.

IBYBAMJI D. SAKLATWALLA, OF BRIDGEVILLE, PENNSYLVANIA, ASSIGNOB TO THE AMERICAN.VANADIUM (20., F PITTSBURGH, PENNSYLVANIA, A COMORATION OF NEW JERSEY.

PROCESS FOR RECQVERY 0F VANADIUM.

. To all whom it may concern:

- vanadium from complex ores and to efl'ectuallydivorce the vanadium from other metals and impurities which the ores may contain. v

With this object in view, the invention consists in certain novel steps in the process of extracting vanadium from ores, as

hereinafter set forthand pointed out in the claim.

The process is carried out substantially as follows: The ore, ground to about 60-80 mesh is treated with a suitable dissolving acid, preferably dilute sulfuric acid, 1:1, in a suitable vessel and the mass heated and; agitated by steam. The solution thus 'obtained, containing all the vanadium and. other soluble metals originally present in the ore, isdecanted into a settling tank and thus separated from all. insoluble angue material. The olution after settling is pumped into a ecipitatin'g tank Where it Specification of Letters Patent. Patented Mar, 12 1912, Application filed December 22, 1910. Serial No. 598,818. it

is boiled'with steam. and a calculated quantity of a strong oxidizing agent is added to it, which brings at first all the metals to their highest'stage of oxidation and then on continued'boiling causes precipitation of all the vanadium in the form of hydrated red oxid. As an oxidizing precipitating a ent, I employ ammonium persulfate, H,) S O The precipitate will be separated from the supernatent liquid by filtration or decantation and washed to free it from the same. The washed precipitate will then be dried at a temperature 'sufli ciently high'to eliminate all hydrate water, thus leaving a roduot consisting of practically pure V 6: the metal by any preferred process of reduction. v

Having fully deseribed my invention what I claim as new and desire to secure Letters-Patent, is,-

A process for extracting vanadium from complex ores, which consists in subjectin the ore to the action of a dissolvin acid and then treating the solution thus ormed with ammonium persulfate to precipitate the vanadium as an oxid of vanadium free from all other metals contained'in the solution.

In testimony whereof, I have signed this.

specification 1n the presence of two subscribing witnesses.

BYRAMJ I D. SAKLATWALLA.

Witnesses:

JAMES C. GRAY, JAB. A. HANNESY.

which may be reduced to' 

